Terahertz and millimeter wave cloud radar data joint inversion method

A technology of millimeter-wave radar and data combination, applied in the field of radar

Active Publication Date: 2021-02-09
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

[0006] In summary, the existing inversion of cloud physical parameters and the attenuation correction methods involved are mostly applicable to the millimeter-wave frequency band, and the joint inversion of terahertz and millimeter-wave is limited in theoretical analysis and discussion, and needs further research

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[0044] The following is attached figure 1 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described in detail. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and all use imprecise scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In order to make the objects, features and advantages of the present invention more comprehensible, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. condition, so it has no technical substant...

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Abstract

The invention discloses a terahertz and millimeter wave cloud radar data joint inversion method. The method comprises the following steps of: establishing a relationship among terahertz radar reflectivity factors, a millimeter wave radar reflectivity factors and cloud attenuation; establishing a relationship between the radar reflectivity factors of a terahertz frequency band and a millimeter wavefrequency band and cloud physical parameters, establishing a probability formula based on a Bayesian theory, iteratively operating the cloud physical parameters, and taking an error between a physical model value and an observed value as a criterion of iterative convergence to obtain an optimal solution; and iteratively calculating the backscattering cross section and attenuation cross section ofcloud particles according to the cloud physical parameters obtained by inversion, updating the function relationship between the radar reflectivity factors and the cloud attenuation to obtain a new inversion value, and taking the change of the cloud attenuation coefficient in iterative operation as a convergence condition to obtain a dual optimal solution of the cloud physical parameters. Data support is provided for climate prediction, weather forecast and atmospheric science research, and effective application of terahertz cloud radar and millimeter wave cloud radar in a meteorological observation system is promoted.

Description

technical field [0001] The invention relates to the field of radar, in particular to a data joint inversion method of terahertz and millimeter wave cloud radar. Background technique [0002] Clouds are an important part of the Earth's climate system, and play an important role in regulating the radiation balance and water vapor cycle of the Earth-atmosphere system. The accuracy of cloud particle size, shape, number concentration, ice water content, and particle spectrum directly affects The accuracy of the description of its scattered radiation characteristics. The third report of the United Nations Intergovernmental Panel on Climate Change (IPCC) pointed out that a large number of uncertainties in climate models come from the insufficient processing of cloud physics information and the lack of actual observation data to verify cloud parameterization schemes. The fifth report It is pointed out that cloud quantification in climate models is still a challenge, and there are l...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95G01S13/95
CPCG01S17/95G01S13/95Y02A90/10
Inventor 丁霞王海涛付朝伟倪亮
Owner SHANGHAI RADIO EQUIP RES INST
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